Knock Knock: Room Defense – How to Utilize Springboard Tactics on Infinity Train Floor 665

Infinity Train Floor 665 presents a unique tactical environment in Knock Knock: Room Defense that requires precise hero positioning to manage incoming waves effectively. This floor is notable for its specific "springboard" mechanic, which, when used correctly, allows players to disrupt enemy pathing and maximize their defensive uptime.

Understanding the Springboard Mechanic

On Floor 665, the environment features specific tiles or zones that act as springboards. These are not merely obstacles; they are strategic tools that can be leveraged to displace enemies or reset their attack animations.

• Disruption: By forcing enemies onto these tiles, you can effectively knock them back to earlier positions, buying your primary damage dealers more time to clear the wave.
• Crowd Control (CC) Synergy: The springboard effect functions best when paired with heroes that provide slowing or stunning debuffs. If an enemy is CC'd while hitting a springboard, they often stay in a loop of displacement, significantly reducing their output against your room door.

Positioning Strategy

To master this floor, your hero deployment must account for both defensive shielding and the utilization of the board's environmental features.

Execution Tips for Floor 665

1. Prioritize Knock-Back Heroes: Heroes who possess innate push-back abilities are significantly more effective on this floor than those who rely solely on raw DPS. Use them to manipulate enemy placement toward the active springboard tiles.
2. Monitor Door Integrity: Do not become so focused on the springboard mechanic that you neglect your door's health. If the enemy wave is too dense, prioritize defensive structures (such as iron bars or reinforced plating) to stabilize your frontline.
3. Timing the Push: The most effective strategy is to wait until an enemy cluster approaches the edge of the springboard before triggering your hero's active skills. This maximizes the distance the enemies are displaced, effectively resetting the entire wave's progress toward your door.
4. Avoid Over-Commitment: Do not crowd all your heroes onto the springboard tiles. Doing so can limit your own movement and prevent you from reacting to secondary threats that might bypass the main defensive line.

By focusing your team composition on displacement and environmental manipulation, you can overcome the difficulty spike found at Floor 665. Continue to rotate your heroes based on their ability to interact with the board's terrain, and maintain your focus on protecting the door during the brief windows when the springboard is resetting.